Signs of Greatness is an insert set in 2006 Bowman Heritage. This 22 card set features hand signed cards of some of the best prospects in baseball. The cards were inserted at a rate of approximately 1 per hobby box. The set was paralled with a Red Ink version (/5) and a Silver Ink version (1/1). Several cards were inserted as redemption cards that could be exchanged until 12/31/08.